(g) Certificates of Insurance. On or before the Commencement Date, hereafter on each renewal by the Lessee of the insurance required hereby, Lessee will furnish to Lessor a certificate and a letter of undertaking executed and delivered by an Approved Insurance Broker who is authorized by an Approved Insurer, appointed by Lessee, describing in reasonable detail insurance carried on the Aircraft and certifying that the insurance then maintained on the Aircraft complies with the terms of this Lease. Lessee will instruct such Approved Insurance Broker who is authorized by an Approved Insurer to agree to advise Lessor in writing or by telex: (i) at least thirty (30) days (seven (7) days in the case of any war risk and allied perils coverage or such lesser period of time as may be customarily applicable) prior to the termination or cancellation by the underwriters for any reason (including, without limitation, failure to pay the premium therefor) of any such insurance; and (ii) at least three (3) Business Days or, in the case of any war risk and allied perils coverage, such lesser period of time as may be customarily applicable, prior to any non-renewal by the underwriters for any reason (including, without limitation, failure to pay the premium therefor) of any such insurance.